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Cosworth Co% level,help please

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Old 28-08-2004, 02:31 PM
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CosKev3
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Default Cosworth Co% level,help please

The level at idle won't come down below 9%,had m8 check it last week and would'nt go below 10% so fitted a new coolant temp sensor as the screw on ECU did'nt make any difference to levels

Have been told you can reset the mixture screw pot by turning screw 4 turns in then 4 turns out then 2 turns back,supposedly this resets it???

Could this be a chip problem,or is there anything else I can check/replace that would affect fueling?

Any help appreciated
Old 28-08-2004, 03:43 PM
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DazC
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Might be a mapping issue, could be a map sensor issue...there are a few variables. I would get it to a tuner asap before you suffer from bore wash...
Old 28-08-2004, 04:11 PM
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TIFF
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As Daz said, get a tuner to take a look.

Mess with it yourself and you could end up with an engine from Cadburys
Old 28-08-2004, 04:14 PM
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GARETH T
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are you sure there isnt a brake in the wires going too the coolent sensor?
i can tell you the pins if needed so you can measure the resistance with a multimeter!

is the engine hot enough? has the fans come on?

gareth
Old 28-08-2004, 04:19 PM
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Originally Posted by GARETH T
are you sure there isnt a brake in the wires going too the coolent sensor?
i can tell you the pins if needed so you can measure the resistance with a multimeter!

is the engine hot enough? has the fans come on?

gareth
Yeah was hot m8,don't own a multimeter

DazCoes the MAP sensor affect the fueling on tickover?

If so have got a spare 3-bar so could try that!

Cheers
Old 28-08-2004, 05:04 PM
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Originally Posted by CosKev3
Originally Posted by GARETH T
are you sure there isnt a brake in the wires going too the coolent sensor?
i can tell you the pins if needed so you can measure the resistance with a multimeter!

is the engine hot enough? has the fans come on?

gareth
Yeah was hot m8,don't own a multimeter

DazCoes the MAP sensor affect the fueling on tickover?

If so have got a spare 3-bar so could try that!

Cheers
It effects the fueling all over. It is the main sensor the ECU needs to calculate fueling. The ECT sensor has influence on this though...
Old 28-08-2004, 06:39 PM
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Nice 1 DazC

Will give my spare 3 bar a go 2moro,will check connections/earth to it too

Will running it at 9% Co give me bore wash?

Old 28-08-2004, 07:10 PM
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Yes. It's far too rich besides being highly illegal...
Old 28-08-2004, 08:40 PM
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when my cars co was that high it was the map sensor at fault plus the fuel pressure regulator was at 4 bar which is way too much..............
Old 28-08-2004, 09:03 PM
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Originally Posted by the saint
when my cars co was that high it was the map sensor at fault plus the fuel pressure regulator was at 4 bar which is way too much..............
Cheers,will bang sensor on and get m8 to check fuel pressure
Old 11-09-2004, 01:41 PM
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did you get it sorted mate ?
Old 11-09-2004, 04:15 PM
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Not yet

Tryed diffrent MAP sensor,no joy

Found fuel press reg was'nt working as it should be,took vac pipe off and pressure
did'nt rise!

Could have been costly on a long flat out blast

Got a chip on way so going to try that(cheers RS Gus)

Old 11-09-2004, 04:17 PM
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john
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Hope you enjoy the chip m8 came out my car
Old 11-09-2004, 04:19 PM
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Gavin E-Cos
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Kev, I had a simalar problem, take a look at this link.

http://www.rsnorfolk.co.uk/Useful%20Info.html

It worked for me.

Gav
Old 11-09-2004, 04:34 PM
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Originally Posted by john
Hope you enjoy the chip m8 came out my car
Cheers m8.Hope you sort your motor soon.Bargain priced chip though
Old 11-09-2004, 04:37 PM
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Originally Posted by Gavin E-Cos
Kev, I had a simalar problem, take a look at this link.

http://www.rsnorfolk.co.uk/Useful%20Info.html

It worked for me.

Gav
Cheers m8,think your Esc Cos has got a lot more advanced ECU than
my old L6

P8 ain't it in Esc Cos????

Be worth a try I suppose.
Old 11-09-2004, 04:47 PM
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Originally Posted by bbigman2000
did you get it sorted mate ?
Be worth you trying that link bbigman2000

Old 12-09-2004, 12:49 PM
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Gavin E-Cos
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Yes it is P8,

hope you get it sorted.

Gav
Old 22-09-2004, 05:29 PM
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I got mine sorted out bud its an L8 ecu in mine, jsut adjusted the co screw in a little and shes running and idling mint now, havent got A co meter but will take it somewhere soon and have them set it properly
Old 22-09-2004, 06:20 PM
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mines doing the same ...need to find tuner local ish quick
Old 22-09-2004, 07:03 PM
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Mines sorted at last

Back on the road

It was the ECU that was fooked in the end,thank you for everyones input

Bought myself a multimeter and checked all resistances on sensors and earths etc on ECU plug,meter was £8,well worth the money

Thanks also to MSD,very helpfull and freindly advice over the phone

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